ABAP Select data from SAP table OILMCMSEG into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OILMCMSEG table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to OILMCMSEG. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the OILMCMSEG table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_OILMCMSEG TYPE STANDARD TABLE OF OILMCMSEG,
      WA_OILMCMSEG TYPE OILMCMSEG,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <OILMCMSEG> TYPE OILMCMSEG.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OILMCMSEG.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OILMCMSEG
  INTO TABLE IT_OILMCMSEG.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OILMCMSEG
*  INTO TABLE @DATA(IT_OILMCMSEG2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_OILMCMSEG INDEX 1 INTO DATA(WA_OILMCMSEG2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OILMCMSEG ASSIGNING <OILMCMSEG>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OILMCMSEG>-OITAXFROM = 1.
<OILMCMSEG>-OITAXTO = 1.
<OILMCMSEG>-OIHANTYP = 1.
<OILMCMSEG>-OITAXGRP = 1.
<OILMCMSEG>-OIPRICIE = 1.

ENDLOOP.

LOOP AT IT_OILMCMSEG INTO WA_OILMCMSEG.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OILMCMSEG-OIINVREC, sy-vline,
  WA_OILMCMSEG-OIOILCON, sy-vline,
  WA_OILMCMSEG-OIOILCON2, sy-vline,
  WA_OILMCMSEG-OIFUTDT, sy-vline,
  WA_OILMCMSEG-OIFUTDT2, sy-vline,
  WA_OILMCMSEG-OIUOMQT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OILMCMSEG you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_OILMCMSEG TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_OILMCMSEG INTO WA_OILMCMSEG.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit CUNIT, internal->external for field OIUOMQT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OILMCMSEG-OIUOMQT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILMCMSEG-OIUOMQT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIMATREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OILMCMSEG-OIMATREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILMCMSEG-OIMATREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIEXGPTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OILMCMSEG-OIEXGPTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILMCMSEG-OIEXGPTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIMATIE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OILMCMSEG-OIMATIE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILMCMSEG-OIMATIE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIEXGNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OILMCMSEG-OIEXGNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILMCMSEG-OIEXGNUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field OIBASPROD
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OILMCMSEG-OIBASPROD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILMCMSEG-OIBASPROD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field OIBPMEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OILMCMSEG-OIBPMEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILMCMSEG-OIBPMEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field OIBOMHEAD
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OILMCMSEG-OIBOMHEAD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OILMCMSEG-OIBOMHEAD.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_OILMCMSEG_STR, 
OITAXFROM TYPE STRING,
OITAXTO TYPE STRING,
OIHANTYP TYPE STRING,
OITAXGRP TYPE STRING,
OIPRICIE TYPE STRING,
OIINVREC TYPE STRING,
OIOILCON TYPE STRING,
OIOILCON2 TYPE STRING,
OIFUTDT TYPE STRING,
OIFUTDT2 TYPE STRING,
OIUOMQT TYPE STRING,
OITAXQT TYPE STRING,
OIFUTQT TYPE STRING,
OITAXGRP2 TYPE STRING,
OIKNUMV TYPE STRING,
OIMATREF TYPE STRING,
OIEXGPTR TYPE STRING,
OIMATPST TYPE STRING,
OIMATIE TYPE STRING,
OIEXGNUM TYPE STRING,
OIEXGTYP TYPE STRING,
OIFEETOT TYPE STRING,
OIFEEPST TYPE STRING,
OIFEEDT TYPE STRING,
OIEXGUPE TYPE STRING,
OISBREL TYPE STRING,
OIBASPROD TYPE STRING,
OIBPQTY TYPE STRING,
OIBPMEINS TYPE STRING,
OIEXGSIGN TYPE STRING,
OIASTBW TYPE STRING,
OIBOMHEAD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OILMCMSEG_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_OILMCMSEG_STR-OITAXFROM sy-vline 
WA_OILMCMSEG_STR-OITAXTO sy-vline 
WA_OILMCMSEG_STR-OIHANTYP sy-vline 
WA_OILMCMSEG_STR-OITAXGRP sy-vline 
WA_OILMCMSEG_STR-OIPRICIE sy-vline 
WA_OILMCMSEG_STR-OIINVREC sy-vline 
WA_OILMCMSEG_STR-OIOILCON sy-vline 
WA_OILMCMSEG_STR-OIOILCON2 sy-vline 
WA_OILMCMSEG_STR-OIFUTDT sy-vline 
WA_OILMCMSEG_STR-OIFUTDT2 sy-vline 
WA_OILMCMSEG_STR-OIUOMQT sy-vline 
WA_OILMCMSEG_STR-OITAXQT sy-vline 
WA_OILMCMSEG_STR-OIFUTQT sy-vline 
WA_OILMCMSEG_STR-OITAXGRP2 sy-vline 
WA_OILMCMSEG_STR-OIKNUMV sy-vline 
WA_OILMCMSEG_STR-OIMATREF sy-vline 
WA_OILMCMSEG_STR-OIEXGPTR sy-vline 
WA_OILMCMSEG_STR-OIMATPST sy-vline 
WA_OILMCMSEG_STR-OIMATIE sy-vline 
WA_OILMCMSEG_STR-OIEXGNUM sy-vline 
WA_OILMCMSEG_STR-OIEXGTYP sy-vline 
WA_OILMCMSEG_STR-OIFEETOT sy-vline 
WA_OILMCMSEG_STR-OIFEEPST sy-vline 
WA_OILMCMSEG_STR-OIFEEDT sy-vline 
WA_OILMCMSEG_STR-OIEXGUPE sy-vline 
WA_OILMCMSEG_STR-OISBREL sy-vline 
WA_OILMCMSEG_STR-OIBASPROD sy-vline 
WA_OILMCMSEG_STR-OIBPQTY sy-vline 
WA_OILMCMSEG_STR-OIBPMEINS sy-vline 
WA_OILMCMSEG_STR-OIEXGSIGN sy-vline 
WA_OILMCMSEG_STR-OIASTBW sy-vline 
WA_OILMCMSEG_STR-OIBOMHEAD sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.